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Finding the Fourth Proportional to 68,812.35, 103,218.68 and 18,893.13

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Solution

The fourth proportional to 68,812.35, 103,218.68 and 18,893.13 is: 28,339.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,812.35 : 103,218.68 = 18,893.13 : x
  2. Step 2: Convert to fraction form
    68,812.35/103,218.68 = 18,893.13/x
  3. Step 3: Cross multiply
    68,812.35x = 103,218.68 × 18,893.13
  4. Step 4: Simplify right side
    68,812.35x = 1,950,123,728.85
  5. Step 5: Solve for x
    x = 1,950,123,728.85/68,812.35
  6. Step 6: Final answer
    x = 28,339.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.